DPS 2001 meeting, November 2001
Session 38. Titan Posters
Displayed, 9:00am Tuesday - 3:00pm Saturday, Highlighted, Friday, November 30, 2001, 9:00-10:30am, French Market Exhibit Hall

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[38.02] Latitudinal variation in Titan's haze from Voyager imaging

B. Lourenco, M. Roos-Serote (CAAUL/OAL), P. Rannou (Service d'Aeronomie, Paris), K. Rages, C. McKay (Nasa/AMES)

Titan showed an unexpected north-south asymetry when the Voyager spacecraft flew by in the 1980. Images taken in with the Imaging Sub Systems on these spacecraft showed the presence of a main and a detached haze layer. Rannou et al. 1997 (JGR 102, 10.997) analyzed two high phase angle images applying a microphysical model for fractal particles and a scattering radiative transfer model, working with a code of optical properties for fractal aggregates. From fitting the I/F-altitude profiles they obtained information about the production altitude and the mean aggregate structure.

Here, we present the results of the analysis of about ten images at different phase angles and in different wavelength filters. Simultaneous fits of all data show that the latitudinal variation of the haze characteristics (aerosols number, size and structure) is small.

The author(s) of this abstract have provided an email address for comments about the abstract: brunol@oal.ul.pt

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